Kate Middleton and Prince William 'hope to be pregnant with a third baby by Christmas'

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge arrive at Youthscape on August 24, 2016 in Luton, England. (Photo by Chris Jackson/Getty Images)The Duke and Duchess of Cambridge arrive at Bute Mills in Luton, to tour the facilities of national charity Youthscape. Picture: Jonathan Brady/PA Wire30. Until he facepalmed when Prince William was scolded by the Queen during the Trooping the Colour this year.Britain's Catherine, Duchess of Cambridge, smiles during a visit to a helpline service, as part of a Heads Together campaign in London. Picture: REUTERS/Arthur Edwards/Pool(L-R) Camilla, Duchess of Cornwall, Prince Charles of Wales, Catherine, Duchess of Cambridge, Princess Charlotte of Cambridge, Prince George Of Cambridge and Prince William, Duke of Cambridge watch a fly past during the Trooping the Colour, this year marking the Queen's 90th birthday at The Mall on June 11, 2016 in London, England. The ceremony is Queen Elizabeth II's annual birthday parade and dates back to the time of Charles II in the 17th Century when the Colours of a regiment were used as a rallying point in battle. (Photo by Ben A. Pruchnie/Getty Images)Kate Middleton on a day-long tour of Cornwall. Picture: Chris Jackson/PA Wire31. Prince George walks with his mother, the Ducheess of Cambridge during a visit to the Royal International Air Tattoo at RAF Fairford and stole the show as expected.King in waiting: Prince George celebrated his third birthday last week, prompting his father Prince William to comment how ‘spoilt’ he’d been Photo: TPX Images of the DayCatherine, Duchess of Cambridge, Princess Charlotte of Cambridge and Prince George of Cambridge watch a fly past during the Trooping the Colour, this year marking the Queen's 90th birthday at The Mall on June 11, 2016 in London, England. The ceremony is Queen Elizabeth II's annual birthday parade and dates back to the time of Charles II in the 17th Century when the Colours of a regiment were used as a rallying point in battle. (Photo by Ben A. Pruchnie/Getty Images)

Kate Middleton and Prince William are reportedly planning on expanding their family.

The Duke and Duchess of Cambridge (both 34), who are parents to Prince George (three) and Princess Charlotte (16 months), are said to be hoping to be pregnant with a third child sooner rather than later.

A new report suggests the royal couple have "both always wanted a big family" and want to get started straight away, which might explain why they have been upping their royal duties this year.

Both have come under fire for their lack of public appearances before the summer, but have significantly increased their royal engagements in recent months, with insiders suggesting it may have something to do with them slowing down their schedule in 2017 if another baby was on the way.

30. Until he facepalmed when Prince William was scolded by the Queen during the Trooping the Colour this year.

"It would not surprise me if they were pregnant by Christmas," an insider told Us Weekly.

"I think they both would have been overwhelmed at the thought of a third child a year ago, but now it sounds perfect. They've both always wanted a big family."